Brake



May 12, 1925. l 1,537,611

F3. V. HUTCHINSON BRAKE Filed Maj 23, 1921 'i Patented May v12, 1.925.

UNlTED STATES ROLAND V. EUTCHINSON, O'F DAYTON,

SEARCH CORPORATION, OF DAYTO'N,

OHIO, ASSIGNOR TO GENERAL MOTORS RE- OHIO, A CORPORATION OF DELAWARE.

BRAKE.

4applicati@ med M'ay 2a, 1921. seria1 No. 471,614.

To whom t may concern.'

Be it known that I, ROLAND V. I-IUTCHIN-- SON, a subject of the King of lGrreat B ritain,

.exact description.

residing at Dayton, county of Montgomery,

and State of Ohio, .have invented certain new and useful- Improvements in Brakes, of which the following is a full, clear,` and The invention relates to brakes -'and is lmore particularly concerned with a brake.

mechanism especially designed for use in connection with the rear wheel of a motor vehicle.

The primary object of the invention is to provide a brake mechanism'of simple coI 1v struction, inexpensive to manufacture and easy to assemble.

A further object is to provide abrake mechanism comprising a one-piece cam and brake lever together with means whereby the cam may be placed in operative position relative to the brake band'.

A further object is' to improve the construction of brake mechanism as hereinafter described in detail and set forth in the appended claims. l

In the accompanying drawings villustrating one embodiment of the invention,

Fig. 1 ris a sectional view showing parts' of a vehicle wheel, axle, and bra-ke;

Fig. 2 ris a side elevation showing -the brake mechanism of Fig. 1; Fig. 3 is an elevation of a portion of the brake flange; and

Fig. 4 is a perspective view of a portion of the brake band and the operating mechanism. v Referring to the drawings, 5 indicates an axle housing within which a live axle 6 is supported on bearings 7, a wheel hub 8 being secured to the outer end of the axle.

These parts may be of any usual or suitable construction, the invention being applicable to wheels'and axles of various types and being useful 'also in some .respects in other relations.

. To the wheel is secured, as by bolts 9, a brake drum 10 having a flange 11 the inner surface of which provides a brake surface. A fixed member, shown as a brake fiange 12, preferably formed integrally with the axle housing 5, closes the inner side of the brake drum and thereby provides an enclosed space within which the brake band 13 may be housed. v

" The operating around the shaft.

`ture must be rotated through `more or less in order to be brought into nor'- Vjustment and resilient y' The brake` band is shown as comprising a strip of sheet metal withy a facing of suitable friction material, the ends of the metal strip being bent inwardly as at 13, to provide abutments for a brake operating member 14. At a point approximately intermediate the ends ofthe band a sheet metal loop 1 5 is secured to the band as by rivets 16, the loop and band together forming anv is expanded inwardly to form an eyelet 19.'

A coiled spring 20 is positioned within the band with its ends connected to the eyelets 19, thereby serving to retract the band from the brake surface.

shaped as a double cam and may be forged or otherwise formed in one piece with the rock shaft 21 and lever arm 22. A bearing support or sleeve for the rock shaft is'provided by an apertured lug 23 on the flange 12, a bushing 24 being mounted around the rock shaft. In order to permit the assembly of the parts the aperture in the lug 23 ris provided with extensions 25 of such shape and size that the cam may be inserted through the aperture, the bushing 24 having been first formed in position on the rock. shaft by ybending a strip of sheet metal The aperture in the lug 23 is so positioned that the bra-ke operating member 'after insertion through the aperan angle of 90 mal operative position. The rock-shaft is therefore retained in its bearing by enf-i gagement of the end of thevcam with the inner surface of ange 12:

A hole 26 is provided 1n the free end of lever 22 through which a'brake rod 27 is member '14 is preferably I inserted and adjustab1yretained by nut 28,

the latter having lugs 29 engageable in notches 30 in the arm to retain the parts in adjusted position. A s ring 31 permits adholds the nut 28 against the arm.

. Various changes of construction .without departing from the may be made in details A scope of the invention and vtherefore it is not desired that the invention be limited to the specific structure set forth except as required by the language of the appended claims in View of the pr1or art. l

I claim:

1. In brake mechanism of the class described and in combination in a rear axle housing, a brake shoe supporting flange supported from and by said axle housing; a rock shaft supported within an opening in and adjacent the periphery of said supporting flange; and a brake operating cam on one end of said rock shaft; the openingl in y said supporting flange being of such form and size that said through.

2. In brake mechanism of the class described and in combination with a rear axle housing, a brake shoe supporting flange supported from and by said axle housing; a rock shaft supportedwithin an opening in and adjacent the periphery of said supportcam may pass thereing flange; a brake operating cam upon oneend of said rock shaft; and a bushing surrounding said rock shaft and tting Within said opening, and which bushing forms a bearing for said shaft; the opening in said supporting flange being of such form and size that said cam may pass therethrough.

3 In brake mechanism of the class descrlbedand 1n comblnatlon with a rear axle housing, a brake shoe supporting flange supported from and by said axle,l housing; a rock shaft supported Within an opening in and adjacent the periphery of said supporting flange; and a brake operating cam upon one end of and integral with said rock shaft;

the opening in said supporting flange being of such form and size that said cam may pass therethrough.

4. In brake mechanism of fthe class described and in combination with a rear axle housmg, a brake shoe suppo-rtuig flange supintegral therewith; the opening in said supporting flange being of such form and sizeA that said cam may pass therethrough.

In testimony whereof I hereto aiixmy signature.

ROLAND V. HUTCHINSON. Witnesses:

R. K. LEE, A. C. LEHMAN. 

